static void
assert_emit_target_for_backward_branches(unsigned char expected_prefix,
unsigned char expected_opc,
enum insn_type insn_type)
{
struct basic_block *target_bb;
struct compilation_unit *cu;
struct var_info *eax, *ebx;
cu = compilation_unit_alloc(&method);
eax = get_fixed_var(cu, MACH_REG_EAX);
ebx = get_fixed_var(cu, MACH_REG_EBX);
target_bb = get_basic_block(cu, 0, 1);
bb_add_insn(target_bb, imm_reg_insn(INSN_ADD_IMM_REG, 0x01, eax));
assert_emits_branch_target(expected_prefix, expected_opc, 0xf8, 0xff, 0xff, 0xff, target_bb, insn_type);
bb_add_insn(target_bb, imm_reg_insn(INSN_ADD_IMM_REG, 0x02, ebx));
assert_emits_branch_target(expected_prefix, expected_opc, 0xf5, 0xff, 0xff, 0xff, target_bb, insn_type);
free_compilation_unit(cu);
}
void test_honors_fixed_interval_register_constraint_for_overlapping_intervals(void)
{
struct compilation_unit *cu;
struct var_info *v1, *v2;
cu = compilation_unit_alloc(&method);
v1 = get_fixed_var(cu, R0);
v1->interval->range.start = 0;
v1->interval->range.end = 2;
v2 = get_var(cu);
v2->interval->range.start = 0;
v2->interval->range.end = 2;
allocate_registers(cu);
assert_int_equals(R0, v1->interval->reg);
assert_int_equals(R1, v2->interval->reg);
free_compilation_unit(cu);
}
static void
assert_backpatches_unresolved_branches_when_emitting_target(
unsigned char expected_prefix,
unsigned char expected_opc,
enum insn_type insn_type)
{
struct basic_block *target_bb, *branch_bb;
struct compilation_unit *cu;
struct var_info *eax;
cu = compilation_unit_alloc(&method);
eax = get_fixed_var(cu, MACH_REG_EAX);
branch_bb = get_basic_block(cu, 0, 1);
target_bb = get_basic_block(cu, 1, 2);
bb_add_insn(branch_bb, branch_insn(insn_type, target_bb));
assert_backpatches_branches(expected_prefix, expected_opc, 0x00, branch_bb, target_bb);
bb_add_insn(branch_bb, imm_reg_insn(INSN_ADD_IMM_REG, 0x01, eax));
assert_backpatches_branches(expected_prefix, expected_opc, 0x03, branch_bb, target_bb);
free_compilation_unit(cu);
}